Anatomic variations of the midcarpal joint.
Two distinct anatomic variations in the human midcarpal joint have been identified. In type I the triquetrohamate joint is on a smooth oblique plane with the capitolunate joint. In type 2 the triquetrohamate joint is separated from the capitolunate joint by a concave transition facet on the hamate and lunate. Degenerative change occurring at the proximal pole of the hamate and the opposing transition facet on the lunate have been identified as characteristic of both a type 2 joint and lunotriquetral interosseous ligament tears.
Burgess
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RC
Section of Hand Surgery, University of Kentucky, Lexington.
D000368:Aged; D000369:Aged, 80 and over; D001168:Arthritis / Q000473:pathology*; D005260:Female; D006801:Humans; D008023:Ligaments, Articular / Q000033:anatomy & histology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D014955:Wrist Joint / Q000033:anatomy & histology / Q000473:pathology*